Mifflin County's 2026 population is estimated at 45,905, reflecting a -0.03% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Mifflin County is the 47th largest county in Pennsylvania. The 2010 population was 46,638 and has grown -1.57% since 2010.
Data after 2023 is projected based on recent change
Overall: 43.4 years
Female: 44 years
Male: 42.9 years
There are 35,613 adults, (10,130 of whom are seniors) in Mifflin County.
Female: 23,436 (50.9%)
Male: 22,605 (49.1%)
The racial composition of Mifflin County includes 93.49% White, and smaller percentages for Black or African American, other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 43,044 | 93.49% |
| Two or more races | 2,077 | 4.51% |
| Black or African American | 449 | 0.98% |
| Other race | 260 | 0.56% |
| Asian | 146 | 0.32% |
| Native American | 41 | 0.09% |
| Native Hawaiian or Pacific Islander | 24 | 0.05% |
Mifflin County 's average per capita income is $43,905. Household income levels show a median of $63,953. The poverty rate stands at 16.23%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $86,838 | $97,484 |
| Families | $77,180 | $87,091 |
| Households | $63,953 | $76,786 |
| Non Families | $39,215 | $51,885 |
Average Income
Median Household Income
Poverty Rate